Casing washer



Jan. Z7, 1925.

n E. STEPHENS cAsING WASHER v ,Filed Feb. 21, 1924 f -INVENTOR f TERME/v,

A TTORN E YS Patented Jan. 27, 1925.

LEWIS ELY STEPHENS, OF FELLDWS. CALIFORNIA.

- cAsING WASHER.

Application led February 21, 1924. ASerial No. 694,310.

To all 'whom t may concern.'

Be it known that I, Lnwrs ELY STEPHENS, a citizen of the United States, and a resident of Fellows, in the county of Kern and State of California, -have invented certain new and useful Improvements in Casing l/Vashers, of which the following is a specilication.

This invention relates to a casing Washer, and is especially designed for use with the perforated casings of wells although of course adapted for use with other similar casings. A Y v The objectl of the invention is to provide a casing washer of this character which effectively applies the cleaning fluid so as to obtain a highly eflicient cleansing action and which is economical in its use of the cleansing fiuid. I

A further object is to provide a casin 'washer having the foregoing enumera advantages and capacities and which is adapted to be readily and convenientl inserted into the casing or withdrawn. t ere# from and which is in general of simple and' durable construction, reliable and efficient in operation and easy and comparatively inexpensive to manufacture.

Other objects and advantages of'the invention 'reside incertain novel features of the construction, combination and arrangement of parts which will be hereinafter more full described and particularly pointedout in t e appended claims, reference being had to the accompanying drawings forming part of this specification, and in which:

Figure 1 is a fragmentary view, partly in section and partly in elevation, showing a portion of the perforated casingand a casing washer embodying the present invention in use in conjunction with said casing;

Fi e 2 is a view in section on line 2-2 v of Figure 1;

like with which the present invention is designed for use. The perforations of the casing l are designated at 2.

The casing washer which constitutes the present invention comprises a body port-ion 3 which is preferably of cylindrical form and of a diameter and` length best suitedto the work. The body portion 3 is formed with a chamber 4, the lower end of which is closed by a plug 5 threaded into the cylindrical body portion. The plug 5 is provided in order to permit of ready access to the interior of the'lower end of the chamber 4.

f The upper end ofthe eccentric body portion 3 has threaded connection with the lower end of the tubing 6. It will be understood that water or other suitable fluid is pumped or otherwise forced under pressure into the tube 6 or into the chamber 4 so that the tubing constitutes means for supplying fluid under pressure to the chamber 4.

The body portion 3 is formed with a number of opemngs, designated generall at 7, which extend from the chamber 4 t rough the body portion to the exterior l'and in each of these openings a 'et, designated generally at 8, is mounted. he openings 7 and the jets 8 mounted therein are spaced angularly of identical construction a single description will apply to all. Each opening 7 extends radially of the cylindrical 4body portion and around the inner end of each opening the body ortion is cut away, to provide an enlargerf) recess 9. This recess 9 forms an annular shoulder 10. Beyond the shoulder 10 the opening 7 is internally threaded, as at 11 and is of approximately the same diameter as the recess .9. In this internally threaded portion of the opening 7 packing 12 is arranged and is held by a packing nut or follower 13 and lock washer 14. The face 15 of the shoulder 10- engaged by the packing 12 is inclined so that by tightening up the follower or nut 13 the packing will .be forcedV into engagement with the jet 8.

Each jet 8 comprises a tubular body portion 16 preferably of cylindrical form and slidably fitted in the opening 7. The in ner end' of the body portion16 of each jet 8 is open and freely communicates with the chamber 4. The outer end of the body portion is provided with a head 17 having a discharge orifice 18 formed therein and arranged centrally thereof. The outer 'end face or surface of the head 17 is rounded off, as at 19, from the orifices to the periphery of the body portion. A coil spring 20 encircles the inner end of the body portion 16 of each jet and engages the shoulder at one end and a cotter pin 21 at its opposite end. The cotter pin 21 is fitted in diametrically opposite openings 22 provided therefor in 'the body portion 16 and serves as an abutment for the coil spring and also as means to limit the outward movement of the jet.

When the washer is in use it is lowered into the casing 1 and fluid under pressure is pumped or forced down into the tubing 6 into the chamber 4. This fluid passes into the body portions 16 of the jets and acts on the inner surfaces 23 of the heads thereof to force the jets outwardly. It will be understood that the light coil springs maintain the jets `8 inwardly of the body portion 3 except when the fluid pressure is maintained in the chamber 4. It will be noted that by virtue of the rounding off of the outer ends of thejets that the casing 1 is adapted to lie flush up against the discharge orifices 18 and to block these orifices and prevent escape and discharge of the fluid at all times except when the orifices are alined with the perforations 2 of the (asing. This feature provides for an economical use of the cleansing fluid. Since the jets are forced outwardly byV thefluid pressure they are projected tig tly up against the perforations 2 and in this manner a proper andk effective application of the cleansing fluid is had and a washing out` of obstructions or deposits in the perforations 2 is insured. When the cleansing operation has been completed pressure is no longer maintained in the chamber 4 and consequently the springs 20 retract the jets into the body portion 3 of the washer.

l claim:

1. A washer for perforated casings comprising a body portion having a chamber therein and having an opening extending from the chamber to the exterior, a jet slidably mounted in said opening, means for supplying fluid under pressure to said chamber, said jet being `forced outwardly by said fluid and having an orifice at its outer end and being rounded olf from said orifice whereby said orifice is blocked by the casing except when opposed to a perforation thereof.

2. A easing washer employing a washing fluid under pressure and comprising a body portion having a chamber therein and having an opening extending from the chamber to the exterior, and a jet slidably Ymounted in the opening and comprising a tubular body portion having its inner end open and having a head at its outer end provided with a discharge orifice, the pressure of the washing fluid on the head serving to automatically project the same.

3. A casing washer employing a washing fluid under pressure and comprising a body portion having a chamber therein and having an opening extending from the chamber to the exterior, a jet slidably mounted in the opening and designed t-o be projected by the direct actionfof the pressure of the washingr fluid in the jet, and a coil spring cooperable with the jet and the casing for urgingthe jet inwardly of the casing.

4. A casing washer comprising a body portion having a chamber therein vand having an opening extending from the chamber to the exterior, a jet slidably mounted in the opening and comprising a tubular body portion having its inner end open and having a headat its outer end provided with a discharge orifice, packing between the body portion of the washer and the body portion of the jet, and means for supplying fluid pressure to the chamber.

5. A casing washer comprising a body portion having a chamber therein and having an opening extending from the chamber to the exterior, a jet slidably mounted in the opening and comprising a tubular body portion having its inner endv open and having a head at its outer end provided with a `discharge orifice, a coil spring encircling the inner end of the body portion of the jet, one end of the coil spring being engaged with the body portion of the washer and a cotter pin connected with the tubular body portionof the jet and engaged with the coil spring.

6. A casing washer employing a washing fluid under pressure and comprising a body portion having a chamber therein and having an opening extending from the chamber to the exterior, and a jet slidably mounted in the opening and designed to bel projected bythe direct action of the washing fluid thereon.

LES ElLY STEPHENS. 

